IEEE MAC Address

Section 9.2 of IEEE 802-2001 specification describes the 48-bit universal LAN MAC address, Media Access Control address (Hardware Network Address). The first 24 bits is the Organization Unique Identifier (OUI) if the 2nd LSB is set to 0.

MAC_Address
  • If b1 is set to 0 then the MAC address is an individual address.
  • If b1 is set to 1 then the MAC address is identify as one or more destination address, broadcast address.
  • If b2 is set to 0 then the MAC address is Globally unique (OUI enforced).
  • If b2 is set to 1 then the MAC address is locally administered.

Examples of locally administered MAC, “x” is any hex digit:
x2:xx:xx:xx:xx:xx
x6:xx:xx:xx:xx:xx
xA:xx:xx:xx:xx:xx
xE:xx:xx:xx:xx:xx

Published by

Ferdy Mañago

Great Software Ideas, LLC